@article{GDZPPN002302608, title = {Semi-Ideals in Posets.}, journal = {Mathematische Annalen}, volume = {189}, year = {1970}, pages = {338-348}, zbl = {0182.33902}, url = {http://dml.mathdoc.fr/item/GDZPPN002302608} }
VENKATANARASIMHAN, P.V. Semi-Ideals in Posets.. Mathematische Annalen, Tome 189 (1970) pp. 338-348. http://gdmltest.u-ga.fr/item/GDZPPN002302608/